/*
 * This file is part of the KubeVirt project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright 2021 Red Hat, Inc.
 *
 */

package netns

import (
	"fmt"

	"github.com/containernetworking/plugins/pkg/ns"
)

type NetNS struct {
	nspath string
}

func New(pid int) NetNS {
	return NetNS{nspath: fmt.Sprintf("/proc/%d/ns/net", pid)}
}

func (n NetNS) Do(f func() error) error {
	netns, err := ns.GetNS(n.nspath)
	if err != nil {
		return fmt.Errorf("failed to fetch network namespace object: %v", err)
	}

	return netns.Do(func(_ ns.NetNS) error {
		return f()
	})
}
